Picked up on the first ringLive · 00:12
Before helloReturning callerLast call
CallerHi, I called about the leak. Is someone coming?
AgentYes, the plumber is booked for Thursday, with the valve you described last time.
Into the KortexTranscriptSummaryBooked
AI agents04Voice agent

The phone rings. It already knows the answer.

Who picks up when you can’t?
01Two brains

Same voice. Two brains.

A nice voice is the easy part. The hard part is the second sentence, the one that proves it knows who’s calling and why.

CallerHi, it’s about the leak I called about last week. Is someone coming?

Example
The voice alone

I’m sorry, I don’t have any record of that. Could you give me your name, your address and describe the problem?

The caller starts from zero
The voice on a Kortex

Yes. The plumber is booked for Thursday morning, and he’s bringing the valve you described on your last call. Want a WhatsApp reminder the day before?

Last call · transcriptJob sheetPlumber’s calendarWhatsApp thread
Sorted in one sentence

The first one is polite. The second one works there.

02What it reads

What does it know before it says hello?

Everything the Kortex knows about the caller, pulled in the second the phone rings. Plug a source in and listen to how the first five seconds change.

Plug in your sourcesTap to plug or unplug
Its first five seconds
“Hi, good to hear from you again. Is this about the leak from your last call? The plumber can come Thursday at 9.”
03After the call

Hang up. Nothing evaporates.

Every call ends with a transcript and a summary in the Kortex. Without one, the call is gone the second the line goes quiet. Flip the switch.

One day on the phone
Today: 6 calls answered.6 lessons lost.

Every call that didn’t teach your AI is half done. The other half is lost.

Callers tell you more than any form: why they called, what scared them, who sent them, what the competitor quoted.

On a Kortex, every one of those becomes something the next agent, the next hire and you can read.

04The dial

Does it book without asking? Only where you say so.

Every kind of call gets its own setting. Draft: it takes the details, you confirm. Ask: it checks with you first. Automate: it books on the call. Tap a row.

Kind of callSet per task

Every row is its own dial. Start in Draft, promote what it keeps getting right.

Draft

The trust ladderEverything starts in Draft→Ask, once it proves itself→Automate, one task at a time
05Built

Built, not promised.

I build voice agents on Vapi with ElevenLabs voices, including a phone voice concierge that takes the call, answers and books. No call-volume number here yet, so I’ll show you what’s built instead of making one up.

VapiVoice agents on the phoneA real number that picks up, talks, books and hangs up when the job is done.
ElevenLabsA voice you pickWarm, clear and on brand. Not a robot reading a menu.
ConciergeA phone voice conciergeTakes the call, answers what callers ask and books the visit.
KortexTranscript + summaryEvery call lands in the brain as text the next agent and the next hire can read.
0Calls transcribed
in my own Kortex
0Learnings across 80 projects
agents read before they work
0Events captured
in my Kortex
Who builds itTop Rated Plus on Upwork100% Job Success$400K+ earned11,303 hours

Kortex for business is a concept in development. The numbers above are from my own operation, which already runs on one.

06Questions

Ask me anything.

Can an AI answer my business phone?
Yes. I build voice agents on Vapi with ElevenLabs voices: a real phone number that picks up, talks, answers and books. What makes one good isn’t the voice. It’s what it knows when it picks up.
How does a voice agent know my business?
It reads your Kortex before it says hello: who is calling, what they said last time, your calendar, your prices, your policies. The same brain your WhatsApp agent and your team read.
Does it sound like a robot?
It speaks with an ElevenLabs voice you pick. And it answers with the caller’s own context, which is what really makes it sound like someone who works there.
Can it book appointments on its own?
Only where you say so. Every task sits on a dial: Draft (it takes the details and you confirm), Ask (it checks with you first) or Automate (it books on the call). Everything starts in Draft.
What happens after the call?
A transcript and a summary land in the Kortex. You read the summary. The next agent, or the next person who takes a call from that customer, gets the whole story.
What is a Kortex?
A Kortex is one brain for a business: it collects every channel (calls, WhatsApp, email, CRM, docs) and powers every agent and every new hire. Kortex for business is a concept in development; the agents on these pages already run in production for clients. Read the vision.
Read more Why I transcribe every client call → AI employees at work → Why every business needs an AI brain →

Hire me or not: start transcribing your calls now. Every one.

A voice agent without a Kortex is hold music with better manners.

Take the 2-minute audit →Message me on WhatsApp →
AI agents · Voice agentAgents are the hands. Kortex is the brain.
AI agentsSix hands, one Kortex

Same brain, other hands.

01AI engineerWrites, tests and merges code. 335 PRs merged for a client in 102 days.Open → 02Content agentWrites pages and posts in your house voice. 43 pages written.Open → 03WhatsApp employeeAnswers, books and follows up. 3,247 messages handled for a client.Open → 05Call copilotLive takes during your calls, a TODO PDF minutes after.Open → 06AI analystDaily PPC and SEO reports, weekly reviews, the morning brief.Open →